History helps us understand the policies and problems we face today. This chapter will describe the history of public health in Hong Kong over two periods. The fi rst period will cover the early days before World War II (1840s-1940s), and the second will examine public health after the end of World War II and be further divided into three phases, with each phase having its own distinct historical events. Phase 1 covers 1945 to 1960, Phase 2 covers the 1970s and the 1980s, and Phase 3 covers the 1990s to the present.